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7*x+1 = 17/3 // - 17/3
7*x-(17/3)+1 = 0
7*x-17/3+1 = 0
7*x-14/3 = 0 // + 14/3
7*x = 14/3 // : 7
x = 14/3/7
x = 2/3
x = 2/3
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